A female that is heterozygous for an X-linked recessive trait
a. is affected by the condition.
b. usually doesn't live very long.
c. is a carrier of the condition.
Answer: c. is a carrier of the condition.
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A human embryo is capable of movement and has gonads that are distinguishable as either testes or
ovaries by the end of the:a. second week. b. fourth week. c. sixth week. d. eighth week. e. first trimester.
Which of these structures is not likely to contain significant amounts of aerenchyma tissue?
A. water lily leaves B. rice roots C. cypress "knees" D. mangrove pneumatophores E. coconut tree roots
Creutzfeldt-Jakob disease is caused by an error in ____________
A. DNA replication D. protein folding B. translation E. the genetic code C. transcription
Nectar is often produced by plants as an enticement or reward for pollinating animals
Indicate whether the statement is true or false